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Publication numberUS5020179 A
Publication typeGrant
Application numberUS 07/461,290
Publication dateJun 4, 1991
Filing dateJan 5, 1990
Priority dateJan 11, 1989
Fee statusPaid
Also published asCA2007518A1, CA2007518C, DE8900234U1, DE59006266D1, EP0378101A2, EP0378101A3, EP0378101B1
Publication number07461290, 461290, US 5020179 A, US 5020179A, US-A-5020179, US5020179 A, US5020179A
InventorsBenjamin Scherer
Original AssigneeGimelli & Co. Ag
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric toothbrush
US 5020179 A
Abstract
An electric toothbrush comprises a manually guided handle and a brush member having a brush head with a plurality of separately rotating bristle holders which are connected in the brush head to gearing driving them. The bristle holders are mounted in an insert which is insertable into the brush head in a releasable manner so as to be easily exchangeable by the user. Each of the bristle holders has a coupling element in the form of a cam which is insertable, by way of a plug-in connection, in a respective groove in a connecting rod which is connected to a drive means in the handle.
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Claims(5)
We claim:
1. A brush member for an electric toothbrush which is connectable at its lower end to a handle of the electric toothbrush, said brush member comprising:
an exchangeable insert comprising a plurality of axially rotatable bristle holders, each of said bristle holders comprising tufts of bristles extending from an upper portion of the bristle holders and an eccentric cam extending from a bottom portion of the bristle holders;
a brush head at an upper end of the brush member, said brush head comprising means for removably receiving the exchangeable insert; and
driving means for axially rotating said bristle holders, said driving means located within the brush head and comprising a plurality of substantially transverse grooves in a reciprocating connecting rod, said transverse grooves for engaging the eccentric cams of each of the bristle holders of an exchangeable insert received in the receiving means.
2. The brush member according to claim 1, wherein the receiving means comprises an opening in one side of the brush head.
3. The brush member according to claim 2, wherein the exchangeable insert further comprises means for releasably fixing the exchangeable insert within said opening.
4. The brush member according to claim 3, wherein said means for releasable fixing comprises a manually releasable snap connection.
5. The brush member according to claim 4, wherein the manually releasable snap connection comprises a catch located on a side of the exchangeable insert for engagement with a wall of the brush head.
Description
BACKGROUND OF THE INVENTION

The invention relates to an electric toothbrush with a handle which is to be manually guided and with a brush member which has a brush head with several, separately rotating bristle holders which, in the brush head, are connected to gearing for driving them, and in which a component comprising the brush member is connected to the toothbrush so as to be easily exchangeable by the user. EP-O 254 397 relates to such a toothbrush.

As electric toothbrushes of this type are generally used by several people and as the bristles are subject to wear, it is necessary for them to be arranged on a component which can be easily exchanged by the user. According to the above-mentioned EP-O 254 397, the brush member is fixed detachably as a whole on the handle. In conventional electric toothbrushes, in which the brush member merely has to perform an oscillating and/or a to-and-fro movement, the brush member is a relatively simple component, so that exchange thereof involves low costs. With the toothbrush according to EP-O 254 397, however, a total of ten gear wheels driving the bristle holders are arranged in the brush head of the brush member and are driven by a toothed rack which is axially movable in the brush member. The toothed rack is provided with a coupling which, when the bristle holder is placed on the handle, couples to a connecting rod provided therein. Owing to these components which are required in the brush member and form gearing, the brush member is relatively expensive overall, exchange thereof entailing considerable costs.

SUMMARY OF THE INVENTION

The object of the invention is to develop an electric toothbrush such that the exchange of its component comprising the bristle holders involves minimum costs.

According to the invention, this object is achieved in that the component is an insert in which the bristle holders are mounted, and which can be inserted into the brush head, and in that the bristle holders each comprise a coupling element which can be coupled to the gearing by a plug-in connection.

Owing to this design according to the invention, the bristle holders with the bristles are provided on a component which is very simple and can therefore be produced inexpensively. This component merely has rotatably mounted bristle holders without gearing. Several such components can therefore be provided so that the toothbrush can be used by various people or the bristles can also be replaced with low expenditure. The toothbrush is particularly simple in construction if the brush head has a receiver which is open on one side, for holding the insert, and if a manually releasable snap connection is provided for fixing the insert.

The invention could be carried out with the toothbrush according to EP-O 254 397, in which the gearing comprises a toothed rack and several gear wheels. A coaxial peg of each individual bristle holder is engaged in a receiver in an associated gear wheel. However, the overall construction of the toothbrush is simpler if the gearing has a connecting rod comprising transverse grooves in the region of the brush head and if the coupling element is formed in each case by a cam which is arranged on the bristle holder and engages in a transverse groove after insertion of the insert.

Numerous embodiments of the invention are possible. One possible embodiment is illustrated in the drawings to clarify the underlying principle of the invention and is described below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a longitudinal section through a front region of a brush member of a toothbrush according to the invention;

FIG. 2 shows a plan view of the brush member; FIG. 3 shows a perspective view of an insert for the brush member;

FIG. 4 shows a perspective view of a front region of a connecting rod of the brush member; and

FIG. 5 shows a perspective view of the brush member without fittings.

DESCRIPTION OF PREFERRED EMBODIMENT

FIG. 1 shows a brush member 1 which forms a brush head 2 at its front end. In this brush head 2, there is inserted exchangeably from above an insert 3 in which several bristle holders 4-8 with tufts of bristles 9 are rotatably mounted. Each bristle holder 4-8 has a cam 10-14 which, in FIG. 1, projects downward out of the insert 3 and engages in each case in a transverse groove 15-19 in a connecting rod 20 arranged axially movably in the brush member 1. It is important for the invention that the insert 3 can be inserted in an easily releasable manner into a receiver 21 in the brush head 2. If the insert 3 is pulled out of the receiver 21, the cams 10-14 will slide out of the upwardly open transverse grooves 15-19.

In FIG. 2, the transverse grooves 15-19 are shown in broken lines. The cams 10-14 engaged, therein as well as the cams of an additional row of bristle holders are also shown. If the connecting rod 20 performs a reciprocating movement, the engagement of the cams 10-14 and of the additional cams in the transverse grooves 15-19 will cause a rotational movement of all bristle holders 4-8 as well as the additional unnumbered bristle holders.

FIG. 3 shows, on the insert 3 comprising the tufts of bristles 9, a side catch 22 with which the insert 3 can be snapped in the receiver 21.

FIG. 4 shows, in a perspective view, the front part of the connecting rod 20 comprising the transverse grooves 15-19 into which the cams 10-14 shown in FIGS. 1 and 2 of the bristle holders 4-o engage when the insert 3 is placed into the receiver 21.

FIG. 5 shows the brush member 1 as a whole. It can be non-detachably connected to the handle (not shown) of the toothbrush as the insert 3 with the tufts of bristles 9 can be exchanged therein.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2215031 *Feb 27, 1939Sep 17, 1940Neal ElmoreMotor driven toothbrush
US3160902 *Feb 8, 1963Dec 15, 1964Robert Aymar JulianMechanical toothbrush
US3193864 *Jul 30, 1963Jul 13, 1965Herbert MakowskyToothbrush
US3478433 *Apr 15, 1968Nov 18, 1969Richmond George ETooth cleaning tool
US4156620 *May 27, 1977May 29, 1979Clemens George SApparatus and method for cleaning teeth
US4432729 *Apr 23, 1982Feb 21, 1984Fattaleh John BPersonal health care device
US4545087 *Aug 30, 1983Oct 8, 1985Sylvain NahumToothbrush
US4827550 *May 4, 1988May 9, 1989Dental Research CorporationRemovable head mechanism for automatic cleaning device
US4845795 *Oct 25, 1988Jul 11, 1989Dental Research CorporationAutomatic cleaning device
DE3406112A1 *Feb 21, 1984Aug 22, 1985Peter WallrathElectrical toothbrush
DE3630499A1 *Sep 8, 1986Mar 10, 1988Braun AgBuerstenelement fuer eine elektrisch betriebene zahnbuerste
FR1525112A * Title not available
Non-Patent Citations
Reference
1 *Getriebetechnik Lehrbuch, Volmer et al., pp. 53 55 and 72 73.
2Getriebetechnik Lehrbuch, Volmer et al., pp. 53-55 and 72-73.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5069233 *Oct 30, 1990Dec 3, 1991Ritter Charles HMethod and apparatus for removing debris from between and around teeth
US5253382 *Aug 31, 1992Oct 19, 1993Janos BenyPower operated toothbrush
US5404608 *Oct 19, 1993Apr 11, 1995Bausch & Lomb IncorporatedElectric toothbrush
US5411041 *Nov 24, 1993May 2, 1995Ritter; Charles H.Apparatus for removing debris from between and around teeth
US5504960 *May 12, 1995Apr 9, 1996Bausch & Lomb IncorporatedElectric toothbrush
US5524312 *Mar 6, 1995Jun 11, 1996Tan; Kuo-ChingElectric toothbrush
US5555590 *Aug 15, 1995Sep 17, 1996Fuchs GmbhTooth brush
US5617603 *Jul 23, 1996Apr 8, 1997Mei; Tzeng J. N.Brush head assembly of an electric toothbrush
US5822821 *Jan 12, 1996Oct 20, 1998Pentalpha Enterprises Ltd.Electric toothbrush
US6892413Feb 13, 2003May 17, 2005The Procter & Gamble CompanyComplex motion toothbrush
US6952854Aug 27, 2004Oct 11, 2005The Procter & Gamble CompanyComplex motion toothbrush
US7124461Aug 30, 2004Oct 24, 2006The Procter & Gamble CompanyComplex motion toothbrush
US7225494Jul 30, 2002Jun 5, 2007Church & Dwight Co., Inc.Multi-motion toothbrush
US7234187Aug 8, 2005Jun 26, 2007Church & Dwight Co., Inc.Electric toothbrush
US7340794May 1, 2006Mar 11, 2008The Procter & Gamble CompanyMulti-motion toothbrush
US7421753Apr 25, 2006Sep 9, 2008The Procter And Gamble CompanyElectric toothbrushes
US7451514Aug 29, 2006Nov 18, 2008The Procter & Gamble CompanyComplex motion toothbrush
US7631386Nov 4, 2004Dec 15, 2009Bissell Homecare, Inc.Compact carpet spot cleaner
US8156600Sep 9, 2008Apr 17, 2012The Gillette CompanyGum massaging oral brush
US8448285 *Nov 27, 2006May 28, 2013Loops, LlcToothbrush and methods of making and using same
WO2003039394A1Nov 6, 2002May 15, 2003Procter & GambleMulti-motion toothbrush
WO2003039395A2Nov 6, 2002May 15, 2003Procter & GambleMulti-motion toothbrush
WO2003101337A1 *Apr 11, 2003Dec 11, 2003Qingping ZhuanElectric toothbrush
WO2004080330A1Mar 10, 2004Sep 23, 2004Brown Patrick WilliamElectric toothbrushes
WO2005063144A1Dec 17, 2004Jul 14, 2005John Geoffrey ChanElectric toothbrush
Classifications
U.S. Classification15/22.1, 15/176.5
International ClassificationA46B7/08, A61C17/22, A46B13/02, A61C17/34, A46B17/08
Cooperative ClassificationA46B7/042, A46B7/08, A61C17/349, A46B2200/1066, A61C17/3436
European ClassificationA46B7/04A, A61C17/34B, A46B7/08
Legal Events
DateCodeEventDescription
Jun 21, 2002FPAYFee payment
Year of fee payment: 12
Jun 4, 1998FPAYFee payment
Year of fee payment: 8
Jan 10, 1995REMIMaintenance fee reminder mailed
Dec 5, 1994FPAYFee payment
Year of fee payment: 4
Sep 24, 1992ASAssignment
Owner name: BAUSCH & LOMB ORAL CARE DIVISION, INC., GEORGIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GIMELLI & CO. AG;REEL/FRAME:006290/0568
Effective date: 19920812
Jan 5, 1990ASAssignment
Owner name: GIMELLI & CO AG, SWITZERLAND
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCHERER, BENJAMIN;REEL/FRAME:005218/0797
Effective date: 19891220